Portable hoist.



E. C. WINGIRE.

PORTABLE HOIST.

APPLICATION FILED JUNE 21.1915.

Patepted Jan. 30, 1917.

Jazz/anion- .v aim? 1771.652 6" Wdngtzve ear ai men- ERNEST C. WINGIRE,OF IVIINN'EAPGLIS, MINNESOTA, ASSIGNOR 9F SHE-HALF T0 PETER J. N.MILLER, 01: MILLER, SOUTH DAKDTA.

PORTABLE I-IOIST.

Specification of Letters Patent.

Patented'J an. 30, 1917.

To all whom it may concern:

Be it known that I, ERNEST C. WINGIRE, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented a new and usful Improvement in PortableHoist-s, of which the following is a specification.

My invention relates to improvements in sortable hoists, and has for itsprimary obj ect the production of a simple and inexpensive hoistingapparatus, which may be easily and quickly moved from place to place andheavy loads lifted or lowered into any position desired.

More particularly this invention provides a foldable supporting frame towhich a winch is attached and its lifting cable most effectively appliedfor supporting heavy loads. The distribution of the parts of themechanism is also so symmetrically arranged as to equalize any unevenlateral forces, thereby applying the power employed most effectively.

lVith these and other objects in view, which will be apparent from thefollowing description, my invention comprises the features ofconstruction and combination of parts hereinafter more particularlydescribed and claimed.

In the accompanying drawings, forming part of this specification, Figure1 is a side elevation of my invention; Fig. 2 is a detail illustratingthe construction of the winch and its method of attachment to thesupporting frame or tripod; Fig. 8 is a side elevation of part of theyoke portion of the hinge member at the top of the tripod; Fig. 4 is asection taken upon the line XX, Fig. 3, the shaft or pintle of the hingemember not illustrated in F ig. 3, being included in the structure.

In the drawings A indicates the frame or tripod which is constructed inthe form illustrated with three leg members 2, 3 and 4, which are freelyhinged together at their upper ends by a hinge B. The lower ends of theleg members 2 and 3 are pointed to engage the ground or supportingsurface to prevent slipping, while the member 4 is provided with abearing roller 5 to facilitate its movement. The lower ends of all ofthe legs may be provided with bearing rollers when desired to facilitatemovement of the entire tripod for carrying the tripod and its load fromplace to place. The hinge consists of a fixture formed with a body oryoke 6 on both sides of which extend outwardly pairs of flanges 7 and 8.The upper end of the leg 2 is pivotally secured between the flanges 8 bythe bolt 9, while the upper end of the leg 3 is secured between the pairof flanges 7 by the bolt 10, so that the legs 2 and 3 are adapted tofold together. Spanning the space between the sides of the yoke 6 is ashaft or pintle member 11 upon which is freely pivoted the bifurcations12 formed on a coupling 13, which is rigidly secured to the upper end ofthe leg member 4. Journaled freely upon the shaft 11 between thebifurcations l2 and within the yoke is a sheave 14, over which the freeend of a lifting cable 15 travels freely. The shaft 11 permits the legmember 4 to swing inwardly when the tripod is not in use. Thus all ofthe leg members may fold together. Chains or other connecting devicessuch as 16 may be fastened to the leg members to define the distancewhich they are adapted to spread apart.

Upon the lower portion of the leg member 4 and within convenient reachof an operator, a winch C is secured having a winding drum 17 to whichthe lifting cable 15 is secured. This winding drum is rigidly secured toa shaft 18, said shaft being journaled upon a supporting frame 19, whichis clamped by a bolt 20 (see Fig. 2) on the leg member 4. The shaft 18carries a spiral gear 21 and its ends are squared at 22 to permit of theready attachment of a crank handle 23 for turning the shaft and thedrum. Journaled upon the supporting frame 19 transversely of the shaft18 is a drive shaft 24, which carries a worm pinion 25, the teeth ofwhich are adapted to mesh with the teeth of the gear 21. The shaft 24 isslidable in the supporting frame, so that the pinion may be freely movedwith its teeth into engagement with or out of engagement from the teethof the gear 21 when desired. An end of the shaft 24 is also squared at26, so' that the handle 23 may be applied to the shaft 24 for turning itwhen desired. Thus by disengaging the worm pinion from the spiral gear,the drum can be turned freely either directly by the handle 23 or bypulling upon the cable 15, whereas when the worm pinion 25 is engagedwith the gear 21 a powerful effort can be applied by turning the shaft24 to lift or 5 have described the principles of operation of myinvention, together with the apparatus which I now consider to representthe best embodiment thereof, but I desire to have it understood that theconstruction shown is only illustrative, and that the invention can becarried out by other. means and applied to uses other than those aboveset forth within the scope of the following claim. 7

Having described my invention, what I claim as new and desire to'protectby Letters Patent is:

The combination with a portable hoist h ving three posts provided withmeans for limiting their movement away from one another at the bottom,of a fixture comprising u a yoke having two pairs of outstanding- Vflanges between each pair of which'the upper end of each of two of saidposts is pivotpair of bifurcations journaled on said pintle to each sideof said sheave, and lifting mechanism supported by said post.

In testimony whereof, I have signed my name to this specification.

EeNEsT o. WINGIRE.

' (101318101 this patent may be obtained for five cents each, byaddressing the Gommis sioner of Patents, Washington, I). G.

